Pin-retaining means for chains



April 3, 1928. 1,665,100

H. KLAUCKE PIN RETAINING MEANS FOR CHAINS Filed Dec. 13, 1926 .1 J4 if .21 .15

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" rounding Patented Apr. 3, 1928.

UNITED STATES PATENT A OFFICE.

HERMANN KLAUCKE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO BALDWIN CHAIN & MFG. (10., OF AUBURN, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

PIN-RETAINING MEANS FOR CHAINS.-

Application filed DecemberlS, 1926. Serial No. 154,373.

This invention relates to a device for retaining the cross pins which connect the links of chains which are subjected to hard service and takes the lace of an ordinary cotter pin. It is found in practice that the cotter pins ordinarily used, being of soft metal, are easily broken and worn off, thus allowing the chain'to come apart.

The principal object of this invention is to provide a retaining means of comparatively inexpensive construction which w ll serve every purpose of a cotter pin and Wlll not shear off under hard service and to provide the pin portion thereof with a surcup which will protect the pin from in ury and at the same time provide a positive lock for the pin and also act as a washer. The invention also involves a construction in which the chain links are readily detachable for repairs and replacement and are easy to assemble. Other objects and advantages of the invention will appear hereinafter. Reference is to be had to the accompanying drawings in which Fig. 1 is a plan of a chain with a preferred embodiment of this invention applied thereto, one cross pin and connected parts being shown in central section;

Fig 2 is an edge View of the same; and Fi 3 is an elevation of one pin retaln- In the form of the invention shownin the drawings, the chain links 10 are connected with the outer chain links 11 by cross pins 12 of well known type, these cross pins being perforated at 13. Through the perforations 13 is placed a plain pin 14 of high grade steel so as to avoid the wear to which ordinary cotter pins used in this place are subjected. This pin 14 is a single pin extending through the pivot pin only a short distance on each side.

To protect this pin and hold it in position and also constitute a washer, I provide a pin retaining-cup 15, the flat bottom of which is located between the pin and the chain link so that it constitutes a washer and the cylindrical side wall of which is provided with a radial perforation 16.

allow the pin 14 to be withdrawn through I it. In Fig. 3 I have shown this in the form of an indentation 17 and a depression 18 at one side of the round perforation 16. Any distortion of the perforation can be employed.

From that time on the cup is capable of turning freely on the cross pin 12 and the holding in 14 cannot possibly be dislodged, because t e cup is centered and the pin projects into the cup'from both sides of the in 12 as will be seen from Fig. 2. The act that this cup can rotate reduces the wear considerably as it does not have to scrape along a surface with which, it may come in contact. It will be obvious that it also serves as a washer and that it fully protects the pin 14 from injury and prevents its loss by displacement. Therefore, the pins 14 cannot be sheared off under hard service and their injury is comparatively unlikely.

The protection of the pin in such a way constitutes a great saving in the use of heavy chains for various purposes particularly in the oil districts. The loss of time from stopping of some of these chains, owing to the cuttin or wearing of the usual cotter pin, is avoi ed, thus providing another important saving. The means shown allow the use of an alloy steel pin in an inexpensive way.- This is something that cannotbe done very well with the ordinary cotter pin because it is difficult to make them from alloy steela I am aware of the fact that the invention can be carried out in other forms with out departing from the scope thereof as expressed in the claims. Therefore, I do not wish to be limited to the exact form shown but what I do claim is:

1. As an article of manufacture, a holding device for a cross pin of a link chain, comprising a cup-shaped member having a flat uninterrupted bottom adapted to engage the surface of one of the links and having a perforation through the bottom for the cross pin on which it is freely rotatable, and a holding pin extending through the cross pin and located in the cup-shaped membe'r'at a distance below theedge thereof, the cup-shaped member being centered on the cross pin.

2. As an article of manufacture,- a 'pr0-' tecting device for a pin for holding a chain cross pin in position, consisting of a cupshaped member having a bottom provided with a central opening for receiving the cross pin and centering the cup-shaped member thereon, said cup-shaped member to prevent the holding pin from getting out 15 of the cross pin through this opening.

In testimony whereof I have hereunto afiixed my signature.

HERMANN KLAUCKE. 

